Additionally, similar to our assumption, Le Quintrec et al. also hypothesized that for MN patients suffering from CIDP, contactin 1 represents a unique shared antigenic target as the authors investigated kidney biopsy specimens from five patients who had both MN and CIDP and were positive for anti-CNTN1 antibodies. This evidence concerns the gene CNTN1 and chronic inflammatory demyelinating polyradiculoneuropathy.